Virtual image display device and head-mounted display apparatus

Abstract

A virtual image display device includes: a display member including a wavelength-converting region that emits fluorescence upon being excited by image light as a pixel display region, a projection optical system that irradiates the wavelength-converting region with the image light, a light-blocking member arranged at the external side of the display member for suppressing incidence of external light on the wavelength-converting region, a first polarizing member arranged at the face side of the display member and including a first polarizing region, a second polarizing member arranged at the external side of a position of the first polarizing member and including a second polarizing region for restricting the external light to a second polarization direction, and a polarization separation lens element arranged at the face side of the first polarizing member and having refractive power that selectively acts on polarized light of the image light.

What is claimed is: 
     
         1 . A virtual image display device, comprising:
 a display member including a wavelength-converting region as a pixel display region, the wavelength-converting region being configured to emit fluorescence upon being excited by image light;   a projection optical system configured to irradiate the wavelength-converting region with the image light as excitation light having a single wavelength;   a light-blocking member arranged at an external side of the display member and configured to suppress incidence of external light on the wavelength-converting region;   a first polarizing member arranged at a face side of the display member and including a first polarizing region provided corresponding to the wavelength-converting region, the first polarizing region being configured to restrict the image light displayed by the display member to a first polarization direction;   a second polarizing member arranged at an external side of a position of the first polarizing member and including a second polarizing region configured to restrict the external light to a second polarization direction different from the first polarization direction; and   a polarization separation lens element arranged at a face side of the first polarizing member and having refractive power configured to selectively act on polarized light of the image light.   
     
     
         2 . The virtual image display device according to  claim 1 , wherein
 the excitation light is ultraviolet light and   the wavelength-converting region emits fluorescence of any of red light, green light, and blue light by ultraviolet light excitation.   
     
     
         3 . The virtual image display device according to  claim 2 , further comprising
 an ultraviolet radiation blocking member configured to absorb or reflect the ultraviolet light at a face side of the wavelength-converting region.   
     
     
         4 . The virtual image display device according to  claim 1 , wherein
 the excitation light is blue light,   the display member includes a scattering region configured to scatter the blue light, and   the wavelength-converting region emits fluorescence of any of red light and green light by blue light excitation.   
     
     
         5 . The virtual image display device according to  claim 1 , wherein
 the display member includes the wavelength-converting region, and a light-transmitting region enabling visual recognition of an outside world.   
     
     
         6 . The virtual image display device according to  claim 1 , wherein
 the first polarizing regions are discretely provided corresponding to the wavelength-converting regions.   
     
     
         7 . The virtual image display device according to  claim 1 , wherein
 the light-blocking member includes a light-blocking layer configured to suppress incidence of the external light, and   the light-blocking layer has a size corresponding to that of the wavelength-converting region.   
     
     
         8 . The virtual image display device according to  claim 1 , wherein
 the first polarizing member and the second polarizing member are arranged at the same substrate, and   the second polarizing region is arranged around the first polarizing region.   
     
     
         9 . The virtual image display device according to  claim 1 , wherein
 the polarization separation lens element is a polarization separation liquid crystal lens configured to cause a plurality of pixels constituting the display member to collectively form an image.   
     
     
         10 . The virtual image display device according to  claim 1 , wherein
 the projection optical system includes an image display panel configured to display an image, and projects light emitted from a light-emitting region of the image display panel onto the pixel display region as the image light.   
     
     
         11 . The virtual image display device according to  claim 1 , wherein
 the projection optical system projects modulated light from a laser onto the pixel display region as the image light, by a micro mirror driven for scanning.   
     
     
         12 . The virtual image display device according to  claim 1 , wherein
 the light-blocking member, the display member, and the first polarizing member are integrated in order from an external side.   
     
     
         13 . The virtual image display device according to  claim 1 , wherein
 the display member includes a wavelength-converting region for red fluorescence, a wavelength-converting region for green fluorescence, and a wavelength-converting region for blue fluorescence, and includes a light-transmitting region in a region where the wavelength-converting region is not arranged, the light-transmitting region being configured to transmit the external light.   
     
     
         14 . A head-mounted display apparatus comprising:
 a first device and a second device each including the virtual image display device according to  claim 1 ; and   a support device including a temple supporting the first device and the second device, the temple being configured to enable mounting of the first device and the second device on a head.